package net.minecraft.command;

import java.util.List;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.item.Item;
import net.minecraft.nbt.JsonToNBT;
import net.minecraft.nbt.NBTException;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.BlockPos;
import net.minecraft.util.ChatComponentTranslation;

public class CommandClearInventory extends CommandBase {
	/**
	 * Gets the name of the command
	 */
	public String getCommandName() {
		return "clear";
	}

	/**
	 * Gets the usage string for the command.
	 */
	public String getCommandUsage(ICommandSender sender) {
		return "commands.clear.usage";
	}

	/**
	 * Return the required permission level for this command.
	 */
	public int getRequiredPermissionLevel() {
		return 2;
	}

	/**
	 * Callback when the command is invoked
	 */
	public void processCommand(ICommandSender sender, String[] args) throws CommandException {
		EntityPlayerMP entityplayermp = args.length == 0 ? getCommandSenderAsPlayer(sender)
				: getPlayer(sender, args[0]);
		Item item = args.length >= 2 ? getItemByText(sender, args[1]) : null;
		int i = args.length >= 3 ? parseInt(args[2], -1) : -1;
		int j = args.length >= 4 ? parseInt(args[3], -1) : -1;
		NBTTagCompound nbttagcompound = null;

		if (args.length >= 5) {
			try {
				nbttagcompound = JsonToNBT.getTagFromJson(buildString(args, 4));
			} catch (NBTException nbtexception) {
				throw new CommandException("commands.clear.tagError", new Object[] { nbtexception.getMessage() });
			}
		}

		if (args.length >= 2 && item == null) {
			throw new CommandException("commands.clear.failure", new Object[] { entityplayermp.getName() });
		} else {
			int k = entityplayermp.inventory.clearMatchingItems(item, i, j, nbttagcompound);
			entityplayermp.inventoryContainer.detectAndSendChanges();

			if (!entityplayermp.capabilities.isCreativeMode) {
				entityplayermp.updateHeldItem();
			}

			sender.setCommandStat(CommandResultStats.Type.AFFECTED_ITEMS, k);

			if (k == 0) {
				throw new CommandException("commands.clear.failure", new Object[] { entityplayermp.getName() });
			} else {
				if (j == 0) {
					sender.addChatMessage(new ChatComponentTranslation("commands.clear.testing",
							new Object[] { entityplayermp.getName(), Integer.valueOf(k) }));
				} else {
					notifyOperators(sender, this, "commands.clear.success",
							new Object[] { entityplayermp.getName(), Integer.valueOf(k) });
				}
			}
		}
	}

	public List<String> addTabCompletionOptions(ICommandSender sender, String[] args, BlockPos pos) {
		return args.length == 1 ? getListOfStringsMatchingLastWord(args, this.func_147209_d())
				: (args.length == 2 ? getListOfStringsMatchingLastWord(args, Item.itemRegistry.getKeys()) : null);
	}

	protected String[] func_147209_d() {
		return MinecraftServer.getServer().getAllUsernames();
	}

	/**
	 * Return whether the specified command parameter index is a username parameter.
	 */
	public boolean isUsernameIndex(String[] args, int index) {
		return index == 0;
	}
}
